from __future__ import annotations

import gradio as gr
from PIL import Image
import torch

from src.eunms import Model_Type, Scheduler_Type, Gradient_Averaging_Type, Epsilon_Update_Type
from src.enums_utils import model_type_to_size, get_pipes
from src.config import RunConfig
from main import run as run_model


DESCRIPTION = '''# ReNoise: Real Image Inversion Through Iterative Noising
This is a demo for our ''ReNoise: Real Image Inversion Through Iterative Noising'' [paper](https://garibida.github.io/ReNoise-Inversion/). Code is available [here](https://github.com/garibida/ReNoise-Inversion)
Our ReNoise inversion technique can be applied to various diffusion models, including recent few-step ones such as SDXL-Turbo.
This demo preform real image editing using our ReNoise inversion. The input image is resize to size of 512x512, the optimal size of SDXL Turbo.
'''

device = 'cuda' if torch.cuda.is_available() else 'cpu'
model_type = Model_Type.SDXL_Turbo
scheduler_type = Scheduler_Type.EULER
image_size = model_type_to_size(Model_Type.SDXL_Turbo)
pipe_inversion, pipe_inference = get_pipes(model_type, scheduler_type, device=device)

cache_size = 10
prev_configs = [None for i in range(cache_size)]
prev_inv_latents = [None for i in range(cache_size)]
prev_images = [None for i in range(cache_size)]
prev_noises = [None for i in range(cache_size)]

def main_pipeline(
        input_image: str,
        src_prompt: str,
        tgt_prompt: str,
        edit_cfg: float,
        number_of_renoising_iterations: int,
        inersion_strength: float,
        avg_gradients: bool,
        first_step_range_start: int,
        first_step_range_end: int,
        rest_step_range_start: int,
        rest_step_range_end: int,
        lambda_ac: float,
        lambda_kl: float,
        noise_correction: bool):

        global prev_configs, prev_inv_latents, prev_images, prev_noises

        update_epsilon_type = Epsilon_Update_Type.OPTIMIZE if noise_correction else Epsilon_Update_Type.NONE
        avg_gradients_type = Gradient_Averaging_Type.ON_END if avg_gradients else Gradient_Averaging_Type.NONE

        first_step_range = (first_step_range_start, first_step_range_end)
        rest_step_range = (rest_step_range_start, rest_step_range_end)

        config = RunConfig(model_type = model_type,
                    num_inference_steps = 4,
                    num_inversion_steps = 4, 
                    guidance_scale = 0.0,
                    max_num_aprox_steps_first_step = first_step_range_end+1,
                    num_aprox_steps = number_of_renoising_iterations,
                    inversion_max_step = inersion_strength,
                    gradient_averaging_type = avg_gradients_type,
                    gradient_averaging_first_step_range = first_step_range,
                    gradient_averaging_step_range = rest_step_range,
                    scheduler_type = scheduler_type,
                    num_reg_steps = 4,
                    num_ac_rolls = 5,
                    lambda_ac = lambda_ac,
                    lambda_kl = lambda_kl,
                    update_epsilon_type = update_epsilon_type,
                    do_reconstruction = True)
        config.prompt = src_prompt

        inv_latent = None
        noise_list = None
        for i in range(cache_size):
            if prev_configs[i] is not None and prev_configs[i] == config and prev_images[i] == input_image:
                print(f"Using cache for config #{i}")
                inv_latent = prev_inv_latents[i]
                noise_list = prev_noises[i]
                prev_configs.pop(i)
                prev_inv_latents.pop(i)
                prev_images.pop(i)
                prev_noises.pop(i)
                break

        original_image = Image.open(input_image).convert("RGB").resize(image_size)

        res_image, inv_latent, noise, all_latents = run_model(original_image,
                                    config,
                                    latents=inv_latent,
                                    pipe_inversion=pipe_inversion,
                                    pipe_inference=pipe_inference,
                                    edit_prompt=tgt_prompt,
                                    noise=noise_list,
                                    edit_cfg=edit_cfg)

        prev_configs.append(config)
        prev_inv_latents.append(inv_latent)
        prev_images.append(input_image)
        prev_noises.append(noise)
        
        if len(prev_configs) > cache_size:
            print("Popping cache")
            prev_configs.pop(0)
            prev_inv_latents.pop(0)
            prev_images.pop(0)
            prev_noises.pop(0)

        return res_image


with gr.Blocks(css='style.css') as demo:
    gr.Markdown(DESCRIPTION)

    gr.HTML(
        '''<a href="https://huggingface.co/spaces/garibida/ReNoise-Inversion?duplicate=true">
        <img src="https://bit.ly/3gLdBN6" alt="Duplicate Space"></a>Duplicate the Space to run privately without waiting in queue''')

    with gr.Row():
        with gr.Column():
            input_image = gr.Image(
                label="Input image",
                type="filepath",
                height=image_size[0],
                width=image_size[1]
            )
            src_prompt = gr.Text(
                label='Source Prompt',
                max_lines=1,
                placeholder='A kitten is sitting in a basket on a branch',
            )
            tgt_prompt = gr.Text(
                label='Target Prompt',
                max_lines=1,
                placeholder='A plush toy kitten is sitting in a basket on a branch',
            )
            with gr.Accordion("Advanced Options", open=False):
                edit_cfg = gr.Slider(
                    label='Denoise Classifier-Free Guidence Scale',
                    minimum=1.0,
                    maximum=3.5,
                    value=1.0,
                    step=0.1
                )
                number_of_renoising_iterations = gr.Slider(
                    label='Number of ReNoise Iterations',
                    minimum=0,
                    maximum=20,
                    value=9,
                    step=1
                )
                inersion_strength = gr.Slider(
                    label='Inversion Strength',
                    minimum=0.0,
                    maximum=1.0,
                    value=1.0,
                    step=0.25
                )
                avg_gradients = gr.Checkbox(
                    label="Preform Estimation Averaging"
                )
                first_step_range_start = gr.Slider(
                    label='First Estimation in Average (t < 250)',
                    minimum=0,
                    maximum=21,
                    value=0,
                    step=1
                )
                first_step_range_end = gr.Slider(
                    label='Last Estimation in Average (t < 250)',
                    minimum=0,
                    maximum=21,
                    value=5,
                    step=1
                )
                rest_step_range_start = gr.Slider(
                    label='First Estimation in Average (t > 250)',
                    minimum=0,
                    maximum=21,
                    value=8,
                    step=1
                )
                rest_step_range_end = gr.Slider(
                    label='Last Estimation in Average (t > 250)',
                    minimum=0,
                    maximum=21,
                    value=10,
                    step=1
                )
                num_reg_steps = 4
                num_ac_rolls = 5
                lambda_ac = gr.Slider(
                    label='Labmda AC',
                    minimum=0.0,
                    maximum=50.0,
                    value=20.0,
                    step=1.0
                )
                lambda_kl = gr.Slider(
                    label='Labmda Patch KL',
                    minimum=0.0,
                    maximum=0.4,
                    value=0.065,
                    step=0.005
                )
                noise_correction = gr.Checkbox(
                    label="Preform Noise Correction"
                    value=True
                )

            run_button = gr.Button('Edit')
        with gr.Column():
            # result = gr.Gallery(label='Result')
            result = gr.Image(
                label="Result",
                type="pil",
                height=image_size[0],
                width=image_size[1]
            )

            examples = [
                [
                    "example_images/kitten.jpg", #input_image
                    "A kitten is sitting in a basket on a branch", #src_prompt
                    "a lego kitten is sitting in a basket on a branch", #tgt_prompt
                    1.0, #edit_cfg
                    9, #number_of_renoising_iterations
                    1.0, #inersion_strength
                    True, #avg_gradients
                    0, #first_step_range_start
                    5, #first_step_range_end
                    8, #rest_step_range_start
                    10, #rest_step_range_end
                    20.0, #lambda_ac
                    0.055, #lambda_kl
                    False #noise_correction
                ],
                [
                    "example_images/kitten.jpg", #input_image
                    "A kitten is sitting in a basket on a branch", #src_prompt
                    "a brokkoli is sitting in a basket on a branch", #tgt_prompt
                    1.0, #edit_cfg
                    9, #number_of_renoising_iterations
                    1.0, #inersion_strength
                    True, #avg_gradients
                    0, #first_step_range_start
                    5, #first_step_range_end
                    8, #rest_step_range_start
                    10, #rest_step_range_end
                    20.0, #lambda_ac
                    0.055, #lambda_kl
                    False #noise_correction
                ],
                [
                    "example_images/kitten.jpg", #input_image
                    "A kitten is sitting in a basket on a branch", #src_prompt
                    "a dog is sitting in a basket on a branch", #tgt_prompt
                    1.0, #edit_cfg
                    9, #number_of_renoising_iterations
                    1.0, #inersion_strength
                    True, #avg_gradients
                    0, #first_step_range_start
                    5, #first_step_range_end
                    8, #rest_step_range_start
                    10, #rest_step_range_end
                    20.0, #lambda_ac
                    0.055, #lambda_kl
                    False #noise_correction
                ],
                [
                    "example_images/monkey.jpeg", #input_image
                    "a monkey sitting on a tree branch in the forest", #src_prompt
                    "a beaver sitting on a tree branch in the forest", #tgt_prompt
                    1.0, #edit_cfg
                    9, #number_of_renoising_iterations
                    1.0, #inersion_strength
                    True, #avg_gradients
                    0, #first_step_range_start
                    5, #first_step_range_end
                    8, #rest_step_range_start
                    10, #rest_step_range_end
                    20.0, #lambda_ac
                    0.055, #lambda_kl
                    True #noise_correction
                ],
                [
                    "example_images/monkey.jpeg", #input_image
                    "a monkey sitting on a tree branch in the forest", #src_prompt
                    "a raccoon sitting on a tree branch in the forest", #tgt_prompt
                    1.0, #edit_cfg
                    9, #number_of_renoising_iterations
                    1.0, #inersion_strength
                    True, #avg_gradients
                    0, #first_step_range_start
                    5, #first_step_range_end
                    8, #rest_step_range_start
                    10, #rest_step_range_end
                    20.0, #lambda_ac
                    0.055, #lambda_kl
                    True #noise_correction
                ],
                [
                    "example_images/lion.jpeg", #input_image
                    "a lion is sitting in the grass at sunset", #src_prompt
                    "a tiger is sitting in the grass at sunset", #tgt_prompt
                    1.0, #edit_cfg
                    9, #number_of_renoising_iterations
                    1.0, #inersion_strength
                    True, #avg_gradients
                    0, #first_step_range_start
                    5, #first_step_range_end
                    8, #rest_step_range_start
                    10, #rest_step_range_end
                    20.0, #lambda_ac
                    0.055, #lambda_kl
                    True #noise_correction
                ]
            ]

            gr.Examples(examples=examples,
                        inputs=[
                            input_image,
                            src_prompt,
                            tgt_prompt,
                            edit_cfg,
                            number_of_renoising_iterations,
                            inersion_strength,
                            avg_gradients,
                            first_step_range_start,
                            first_step_range_end,
                            rest_step_range_start,
                            rest_step_range_end,
                            lambda_ac,
                            lambda_kl,
                            noise_correction
                        ],
                        outputs=[
                            result
                        ],
                        fn=main_pipeline,
                        cache_examples=True)


    inputs = [
        input_image,
        src_prompt,
        tgt_prompt,
        edit_cfg,
        number_of_renoising_iterations,
        inersion_strength,
        avg_gradients,
        first_step_range_start,
        first_step_range_end,
        rest_step_range_start,
        rest_step_range_end,
        lambda_ac,
        lambda_kl,
        noise_correction
    ]
    outputs = [
        result
    ]
    run_button.click(fn=main_pipeline, inputs=inputs, outputs=outputs)

demo.queue(max_size=50).launch(share=True)